Evans Cycles

He came back out about a minute later with the lockring tightened. I said thank you and was all prepared to leave the shop when he told me he had tightened it with a screwdriver and hammer. I was annoyed because it's potentially damaging for the lockring, but I ignored it, and again started to leave.

He then said to me 'that'll be £11.50 please". Thinking it was some vain attempt at humor I asked him if he was joking, to which he replied "no" and continued to fiddle with the cash register.

I don't wish to argue the toss but OP was "all prepared to leave" before finding out exactly how the lockring was tightened. If a proper job had been done with the correct tools, would you still have been upset to have been charged?